Want to stop spam when Biding
 

I want to stop false bid or stop spam. For that I want to send a verification SMS to their mobile. Is there any program for sending sms?
Suggest me if there is some better process to stop spam or false bid. I have already made a captcha system in that.

Re: Want to stop spam when Biding
 

Any verification is better way of doing it but then for SMS you will need to work with the gateway or can even use Google